Sheet material for special uses



March 24; 1925- 1,530,477

c. CAMPBELL SHEET MATERIAL FOR SPECIAL USES Filed 515131.. 13, 1923 Rubb r: Id H- 3 Sheet 7 One face coaiod Of/zer face Chi into 'jinps WI'f/L far 7 Fabrzc nmasarbent Inked Tipewrrler nbbvn INVENTOR CHARLES Cmmeu.

BY I I l Patented Mar. 24, 1925.

CHARLES CAMPBELL 01 NEW YORK, N. Y-

SHEET MATERIAL FOR SIEIEGIAIL USES.

Application filed September 13, 1923. Serial No. 662,866.

To all whom it may concern:

Be it known that I, CHARLES CAMPBELL,

a citizen of the United States, residing it ()1' have invented a certain new. and useful Im- New York city, in the Stateof New 1 provement in Sheet Materials for Special Uses, of which the followingis a clear, full,

and exact description. I

This invention relates to material adapted for use, either in sheet form for the purposes for which transfer sheets, such as carbon paper, are used, or in strip form for the purposes for which ordinary typewriter ribbons are used, anda general object of the invention is to provide material for such uses characterized by improved utility and desirability.

A particular object of the invention is to provide material for the purposes hereinabove set forth and particularly for use in transferring type impressions which has a striking face that is uncoated with the transfer ink or 0t er pigment and to which the ink or pigment cannot penetrate, and which, therefore, does not tend to fill the type, the transfer face being coated with ink in the usual manner.

Another object ofthe invention is to provide material which is particularly useful for typewriter ribbons and 4 similar purp poses, which permits the formation of the ribbon from a sheet of fabric of a width much greater than the ribbons without the provision of special selvages-on the ribbons, or without separate treatment of the edges to prevent ravelling.

Other objects and important features of the invention will appear from the following description and-claims when considered in connection with the accompanying drawings, in which of fa ric prepared in the manner hereinafter described, and

Fig. 2 illustrates the mode .of using such fabric, both for typewriter ribbons and for transfer sheets.

Fig. 3 is a'diagram indicating the process ste s employed for the making of typewriter rib ns. a

- In pre aring materialfor the uses hereinbove re erred to, and similiar uses, and having the desired characteristics hereinabove set forth, I take a sheet or strip of fabric 1 is a sectional view through a sheet p l of the desired texture, such, for example, as cotton, which may have substantially the texture employed in making typewriter ribbons, and coat one side of this fabric with.

a composition 2to give this side a nonabsorbent and, preferably, smooth finish, while leaving the other side of the fabric in its natural absorbent condition. Any suitable composition Inlay be used for this purpose, such, for example, as linseedoil havin mixed therewith a little glycerine.

Such a coating gives a base which is particularly useful for typewriter ribbons, and which has many advantages over ribbons as now made. Such a ribbon, of course, has the absorbent side coated with typewriter ribbon ink or other transfer pigment 3 and is used with the coated side next to the paper upon which the impression is to be made, thus leaving the smooth non-absorbent coated side to be struck by the type. The type striking this non-absorbent coated side of the fabric cannot possibly pick up any of the ink or other pigment, fuzz or hairs, and therefore remain clean and sharp and the character of the work produced by the machine is thus sharper and more uniform and more legible.

Moreover, when a sheet of miaterial preared in this manner, that is, coated on one side with the non-absorbent material, and coated on the absorbent side with the typewriter or other transfer pigment, is cut into. stri of the desired width of typewriter ri bons, such strips require no artificial ed f g, the coating binding the threads of the abric against ravelling.

It will be apparent that not only may this fabric thus prepared be cut into strips and used as typewriter ribbons, but it may also be used in sheet form for the same puroses for which-carbon sheets are used, particularly where satisfactory manifolding results cannot now be obtained because of the number or weight of the sheets to be written on.

The sheet or fabric coated in the manner 'used for manifoldin where a carbon sheet would give only ab urred one. The use of such sheets will doubtless contribute. to a more extended use of book-keeping systems,

' and so forth, where many copies are required and where the quality of the manifolding work is important.

' What is claimed as new is:

. 1. A material for use as typewriter ribbons, transfer sheets and similar uses, comprising fabric having one side coated with a linseed oil composition adapted to dry thereon and render it non-absorbent, and having the other side thereof left absorbent an'd filled with a suitable transfer medium.

2. A typewriter ribbon formed from a strip of fabric having no selvage, having one face coated with a linseed oil composition acting both to render said face nonabsorbent and to hold the edges ofthe ribbon .againstxavelling and having its other face left absorbent and filled with typewriter ribbon ink.

.3. The process of making typewriter rib-.

bons which consists in coatin one face of a sheet of fabric with a non-a orbent coating comprisin linseed oil and glycerin ada ted to act as a. inder to hold t e edges-of t e subsequently out ribbons against rave], le'aving the other facev absorbent, coating the absorbent face with a suitable ink and then cutting said sheet into ribbons.

Signedat New York city this 11th day of September, 1923. L i CHARLES CAMPBELL.- 

